Superman:The Animated series (season 1, episode 8)

“Stolen memories“ Release date: 11-02-96 Plot: Brainiac, once Krypton’s all-knowing planetary computer, comes to Earth as part of his information-gathering trek across the galaxy, and partners with Lex Luthor on the basis of giving technological progress to humanity. But, as Superman discovers, Brainiac’s intent after gathering the world’s knowledge is to destroy Earth.